Method for solving copper conductor temperature by optical fiber temperature for photoelectric composite submarine cables

Abstract

The invention relates to a method for solving copper conductor temperature by optical fiber temperature for photoelectric composite submarine cables. The method mainly comprises the following steps: (1) listing the thermal load operating current range, ambient temperature range, environment convection heat exchange coefficient range during operation of the photoelectric composite submarine cable, and carrying out uniform discretization respectively; (2) using the optical fiber temperature Tf and parameters I, G and H as the input variable X, and the copper conductor temperature Tc as the output variable; (3) through a test, measuring and acquiring the output optical fiber temperature Tf and the copper conductor temperature Tc under different thermal load operating current I, ambient temperature G and environment convection heat exchange coefficient H of the photoelectric composite submarine cable, wherein X and Tc form mx*n*p input-output sample pairs; (4) selecting a Gaussian function based on a radial basis function of a multilayer feedforward neural network; (5) studying the m*n*p input-output sample pairs by the multilayer feedforward neural network, wherein the study algorithm is a nearest neighbor clustering algorithm, the values of wi, ci and sigmai are obtained after studying, i=1, 2, 3,...N; and (6) solving the copper conductor temperature Tc from I, G, H and Tf by using a formula.

Description

technical field [0001] The invention relates to a temperature monitoring and automatic measurement technology for a photoelectric composite submarine cable, in particular to a method for calculating the temperature of a copper core from the temperature of an optical fiber used in a photoelectric composite submarine cable. Background technique [0002] The photoelectric composite submarine cable contains several copper cores and optical fibers at the same time, which can be used for submarine power and communication cables at the same time. The copper core in the photoelectric composite submarine cable transmits high-power electric energy underwater, which will cause the copper core to heat up. The harsh working environment and power harmonics on the seabed are likely to cause local aging of the photoelectric composite submarine cable material, reducing the thermal conductivity of the photoelectric composite submarine cable material. The contact thermal conductivity coefficie...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to calibrate the thermal performance parameters of different materials inside and between materials in the photoelectric composite submarine cable. The accuracy of the calibrated thermal performance parameters is low, and the calibration process consumes a lot of manpower and material resources.

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